Lightly Curried Party Pot Pie

Ingredients

• 4 cups large chunks cooked chicken
• or
• 3 lb chicken
• 3 lbs chicken pieces
• 1 store bought cooked chicken
• 1 large or 2 small sweet potatoes
• 3 to 4 large carrots
• 2 large leeks
• 2 celery stalks
• 2 tbsp butter
• 1 1/2 tsp each of curry powder, cumin and dried leaf basil
• 1/2 tsp salt
• 1/2 cup all-purpose flour
• 1 cup milk
• 400 ml can of coconut milk, not light
• 1 puff pastry sheet from a 450 g pkg pre-rolled frozen puff pastry or 2/3 of 397 g pkg frozen puff pastry, thawed
• 1 egg, whisked (optional)